Installation, Operation and
Maintenance Manual
OneFlow
®
Anti-Scale System
Chemical-Free, Salt-Free Scale Prevention
Model OF744-10
Model OF844-12
IOM-OF744/844/948/1054
Systems are certified through WQA
against NSF/ANSI Standards 61 and 372
for Lead Free compliance.
Introduction
The Watts OneFlow
®
Anti-Scale System provides protection
from scale formation on internal plumbing surfaces. The
OneFlow
®
system can be installed at the point of entry to a
building to treat both hot and cold water, or it can be located
directly before a water heater, boiler, or other water using
device that requires protection from hard water.
OneFlow
®
prevents scale by transforming the normal dissolved
hardness minerals into undissolved crystal microparticles.
These crystals stay suspended in the water and have a greatly
reduced ability to react and attach to surfaces like dissolved
hardness does. Therefore the problem of internal buildup
of scale in pipes, water heaters and on fixtures and glass is
greatly reduced.
OneFlow
®
is not a water softener or a chemical additive (like
anti-scalants or sequestrants). It is a scale prevention device
with proven third party laboratory test data and years of
successful residential and commercial installation. OneFlow®
is the one water treatment device that effectively provides scale
protection and is a great salt-free alternative to water softening
(ion exchange) or scale sequestering chemicals. Laundry and
warewashing chemistry will likewise require adjustments.
OneFlow
®
Benefits
• Chemical-free scale prevention and protection – converts
hardness minerals to harmless, inactive microscopic crystals
making OneFlow
®
an effective alternative technology to
a water softener for the prevention of scale due to water
hardness
• Virtually maintenance free - no control valve
• Uses environmentally friendly technology by using no salt
or other chemicals to constantly add, no electricity and no
wastewater
• Improves efficiency of all water using appliances – both hot**
and cold
• Simple sizing & installation – all you need to know is pipe
size and the peak flow rate.
WARNING
!
Read this Manual BEFORE using this equipment.
Failure to read and follow all safety and use information
can result in death, serious personal injury, property
damage, or damage to the equipment.
Keep this Manual for future reference.
Do not use with water that is microbiologically unsafe or of
unknown quality without adequate disinfection before or after the
system.
WARNING
!
• Safe for landscaping and lawn watering. No need for costly
bypass plumbing.
• Compatible with all on-site and community wastewater
treatment systems.
• Perfect system for towns or communities where water
softeners are banned or restricted
• OneFlow
®
does not remove minerals or add sodium to the
water supply
• OneFlow can be installed as pre-treatment to commercial
reverse osmosis systems (contact your Watts Representative
for further details)
* For high-flow applications, contact your Watts Representative
for details on larger, multi-tank systems plumbed in parallel
that can meet high flow applications from 100 gpm to and
above 1000 gpm
** For hot water applications where feed water temperature is
100°F – 140°F (38° – 60°C), please consult ES-OneFlow-
HotWater.
Model OF948-16
Model OF1054-20
